Related by context. Frequent words. (Click for all words.) 64 efficient 45 efficiently 45 economical 45 smarter 44 environmentally friendly 42 greener 40 efficiency 40 productive 40 inefficient 39 expensive 39 aesthetically pleasing 39 dependable 38 energy 38 environmentally sound 37 cleaner 37 reliable 36 advantageous 36 predictable 36 importantly 35 environmentally sustainable 35 quicker 35 cheaper 35 better 35 environmentally responsible 35 Efficient 34 user friendly 34 decentralized 34 reliant 34 flexible 34 profitable 34 eco friendly 34 frugal 34 simpler 34 Smarter 33 environmentally conscious 33 wasteful 33 polluting 33 resilient 33 effective 33 carbon footprint 33 greenest 33 uncompetitive 33 inventive 32 thrifty 32 nicer 32 straightforward 32 profligate 32 reduce carbon emissions 32 proactive 32 cheaply 32 businesslike 32 CO2 emissions 32 Efficiency 32 costly 32 stingy 32 miserly 32 cheap 32 agile 32 streamlined 32 reducing carbon emissions 31 Energy Efficient 31 quieter 31 easy 31 attractive 31 resourceful 31 punctual 31 cheapest 31 easier 31 steadier 31 light bulbs 31 sophisticated 31 Expensive 31 sensible 31 competitive 31 carbon footprints 31 sustainable 31 smart 31 carbon neutral 31 crisper 31 leaner 31 friendlier 31 cleanest 30 intuitive 30 counter intuitive 30 affordable 30 recycle 30 trustworthy 30 flashy 30 nimble 30 inexpensive 30 flashier 30 responsive 30 pleasant 30 fitter 30 visually appealing 30 pleasurable 30 pollutes 30 simple 30 technologically advanced 30 carbon emissions 30 pollute